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/*
Copyright (C) 2006-2010 Tuomas Suutari <thsuut@utu.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program (see the file COPYING); if not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA.
*/
#include "QueryResult.h"
#include "QueryErrors.h"
#include "DB/RawId.h"
#include <QList>
using namespace SQLDB;
namespace
{
template <class T>
inline static T variantTo(const QVariant& variant)
{
return variant.value<T>();
}
template <>
inline DB::RawId variantTo(const QVariant& variant)
{
return DB::RawId(variant.value<int>());
}
template <class T>
inline QList<T> readCursor(SQLDB::Cursor& c)
{
QList<T> r;
if (c)
for (c.selectFirstRow(); c.rowExists(); c.selectNextRow())
r.append(variantTo<T>(c.value(0)));
return r;
}
template <class T1, class T2>
inline QList< QPair<T1, T2> > readCursor2(SQLDB::Cursor& c)
{
QList< QPair<T1, T2> > r;
if (c)
for (c.selectFirstRow(); c.rowExists(); c.selectNextRow())
r.append(QPair<T1, T2>(variantTo<T1>(c.value(0)),
variantTo<T2>(c.value(1))));
return r;
}
}
template <class T>
QList<T> QueryResult::asList() const
{
return readCursor<T>(_cursor);
}
namespace SQLDB {
template <>
QList< QPair<QString, QString> > QueryResult::asList() const
{
return readCursor2<QString, QString>(_cursor);
}
}
// Explicit instantiations of QueryResult::asList
template QList<int> QueryResult::asList<int>() const;
#ifndef DB_RAWID_IS_PLAIN_INTEGER
template QList<DB::RawId> QueryResult::asList<DB::RawId>() const;
#endif
template QList<QString> QueryResult::asList<QString>() const;
#ifndef Q_CC_MSVC
template QList< QPair<QString, QString> > QueryResult::asList< QPair<QString, QString> >() const;
#endif
QVariant QueryResult::firstItem() const
{
QVariant r;
if (_cursor) {
_cursor.selectFirstRow();
if (_cursor.rowExists())
r = _cursor.value(0);
}
return r;
}
RowData QueryResult::getRow(uint n) const
{
if (_cursor) {
_cursor.selectFirstRow();
for (uint i = 0; i < n; ++i) {
if (!_cursor.selectNextRow())
break;
}
if (_cursor.rowExists()) {
return _cursor.getCurrentRow();
}
}
throw RowNotFoundError();
}
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